3 of these are incorrect.
Americans will never shut up about the Soviet Union or 9/11 and will therefore never forget about them.
Also, your country has bred enough fame craving gun toting idiots who will shoot up a school for their moment in the news, dead or alive.

This post is referring to personally remembering something. All of this stuff has been recorded, so obviously it won't be forgotten by history, but if you never experienced something then it is impossible to remember.